/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/MeshPlaneCut.h
void SplitCrossingEdges ( bool bDeleteTrisOnPlane, [TArray](API\Runtime\Core\Containers\TArray)< double > & Signs, [TSet](API\Runtime\Core\Containers\TSet)< int > & AlreadyOnPlaneEdges, [TSet](API\Runtime\Core\Containers\TSet)< int32 > & CutPlaneEdges, [TSet](API\Runtime\Core\Containers\TSet)< int > * SplitEdges, [TSet](API\Runtime\Core\Containers\TSet)< int > * OnPlaneVertices, [TSet](API\Runtime\Core\Containers\TSet)< int > * TriangleSelection )